Question

以下是我的代码的相关部分：

model.py

class Blogger(models.Model):
    identity = models.ForeignKey(User, models.SET_NULL, null=True)

    def __str__(self):
        return self.identity.username

我希望能够使用blogger_instance.identity.username搜索博客，所以我做了：

admin.py

@admin.register(Blogger)
class BloggerAdmin(admin.ModelAdmin):
    list_display = ('__str__', 'identity')
    search_fields = ['__str__']

我转到http://127.0.0.1:8000/admin/blog/blogger/，在搜索字段中输入user，点击搜索，然后得到 FieldError ：

FieldError at /admin/blog/blogger/
Cannot resolve keyword '' into field. Choices are: bio, blog, comment, id, identity, identity_id
Request Method: GET
Request URL:    http://127.0.0.1:8000/admin/blog/blogger/?q=user
Django Version: 1.10.6
Exception Type: FieldError
Exception Value:    
Cannot resolve keyword '' into field. Choices are: bio, blog, comment, id, identity, identity_id
Exception Location: /Users/sunqingyao/Envs/django_test/lib/python3.6/site-packages/django/db/models/sql/query.py
in names_to_path, line 1327
Python Executable:  /Users/sunqingyao/Envs/django_test/bin/python
Python Version: 3.6.0
Python Path:    
['/Users/sunqingyao/PycharmProjects/diyblog',
 '/Users/sunqingyao/PycharmProjects/diyblog',
 '/Users/sunqingyao/Envs/django_test/lib/python36.zip',
 '/Users/sunqingyao/Envs/django_test/lib/python3.6',
 '/Users/sunqingyao/Envs/django_test/lib/python3.6/lib-dynload',
 '/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6',
 '/Users/sunqingyao/Envs/django_test/lib/python3.6/site-packages']
Server time:    Tue, 28 Mar 2017 13:01:58 +0800

当我改变

search_fields = ['__str__']

到

search_fields = ['identity']

我得到了 TypeError ：

TypeError at /admin/blog/blogger/
Related Field got invalid lookup: icontains
Request Method: GET
Request URL:    http://127.0.0.1:8000/admin/blog/blogger/?q=user
Django Version: 1.10.6
Exception Type: TypeError
Exception Value:    
Related Field got invalid lookup: icontains
Exception Location: /Users/sunqingyao/Envs/django_test/lib/python3.6/site-packages/django/db/models/fields/related.py in get_lookup, line 694
Python Executable:  /Users/sunqingyao/Envs/django_test/bin/python
Python Version: 3.6.0
Python Path:    
['/Users/sunqingyao/PycharmProjects/diyblog',
 '/Users/sunqingyao/PycharmProjects/diyblog',
 '/Users/sunqingyao/Envs/django_test/lib/python36.zip',
 '/Users/sunqingyao/Envs/django_test/lib/python3.6',
 '/Users/sunqingyao/Envs/django_test/lib/python3.6/lib-dynload',
 '/usr/local/Cellar/python3/3.6.0/Frameworks/Python.framework/Versions/3.6/lib/python3.6',
 '/Users/sunqingyao/Envs/django_test/lib/python3.6/site-packages']
Server time:    Tue, 28 Mar 2017 13:12:09 +0800

我应该将search_fields设置为什么值？

Answer 1

检查search_fields文档，如上所述

这些字段应该是某种文本字段，例如CharField或文本域。您还可以在ForeignKey上执行相关查找 ManyToManyField使用查找API“跟随”表示法：
search_fields = ['identity__username']

所以在你的情况下

{{1}}

另请注意，它并没有说您可以使用第一次尝试的计算属性

Answer 2

像这样编写管理类

     #Register your models here.
     class BloggerAdmin(admin.ModelAdmin):
         list_display = ('__str__', 'identity')
         search_fields = ['identity__fieldname', ]

     admin.site.register(Blogger, BloggerAdmin)

搜索字段必须与此identity__fieldname

类似

在Django admin中搜索时出错

2 个答案: